Centrifugal pump



March 2, 1954 T. F. WASKOSKY ET AL 2,670,687

CENTRIFUGAL PUMP Filed April 12, 1951 /5 /4 1.9 45 /5' J 17 v 23 "#8 T 7 v ,32/ l1 k g2g ....u., jg

f6 1 ,//3 F/GJ Patented Mar. 2, 1954 CENTRIFUGAL PUMP Theodore F. Waskosky and Henry B. Dilly, Henning, Minn.

Application April 12, 1951, Serial No. 220,596 1 Claim. (Cl. 10S-10.2.)`

/This invention relates to new and useful im provements in pumps, and more particularly to pumps for pumping water from well casings, and the like.

A An object of the present invention is to provide a centrifugal vpump comprising an elongated tubular member or pipe provided at its lower end with a housing having an impeller mounted therein and having an operative connection with a power device located at the upper end of the tubular member, whereby when said housing is lowered into a well casing and submerged into the water therein, water may be pumped from the casing byrotation of the impeller.

A vfurther object is to provide a pump of the class described comprising a tubular member having ahousing secured to its lower end and having an impeller therein, and a shaft being mounted vwithin said tubular'member and having its -lower end secured to the impeller, and means at the upper end of said tubular member for driving the shaft and impeller, and said impeller comprising a cup-shaped lower member having a centrally disposed intake in direct communication with the well casing below the housing, whereby when the impeller is driven, water is drawn from the casing into said housing, from whence it is forced upwardly through the tubular member and discharged from the upper end thereof by the pumping action of the impeller.

A further object is to provide a pump comprising an elongated tubular member composed of aplurality of sections, whereby the overall length of said member may be varied in accordance with the length of the well `casing into which it is to be inserted for the purpose of pumping water therefrom, the sections of said tubular member being connected together by couplings each carrying a bearing element disposed in axial alignment with a tubular member for supporting a drive shaft within said member.

Other objects of the invention reside in the novel construction of the vhousing provided at the lower end of the tubular member and the impeller mounted therein; in the means provided in the bottom of the housing for axially and rotatably supporting the impeller within the housing, the upper end thereof being connected to a drive shaft which extends upwardly through the tubular member for connection with a suitable power device such as an electric motor or an internal combustion engine; in the unique construction of the bearing elements provided within the elongated tubular member for supporting theimpeller drive shaft; in the provision'of a centrifugal pumpwhich is capable of pumping a relatively large volume of water under considerable pressure and with a minimum of effort; and in the simple and inexpensive construction of the apparatus'whereby all of the parts thereof may be readily assembled as a composite unit to facilitate handling and the insertion of the pump into a well casing from which water is to be pumped.

These and other objects of the invention and the means for their attainment will be moreapf parent from the following description taken in connection with the accompanying drawings. E

In the accompanying drawings there has been disclosed a structure designed to carry out the various objects of the invention, but it is to be understood that the invention is not confined to the exact features shown, as various changes may be made within the scope of the claim which follows.

In the drawings:

Figure -1 is a vertical sectional view showing the pump operatively mounted within a conventional Well casing, and also showing the impeller housing submerged within the waterl in the casing; v

Figure 2 is an enlarged detail sectional view showing themounting of the impeller within the housing at the lower end of the tubular pump member;

Figure 3 is a sectional plan view on the line 3-3 of Figure 2 showing the preferred arrangement of the impeller vanes; and

vFigure 4 is an enlarged detailed sectional view on the line 4-4 -of Figure 1, showing the novel construction of the bearings for supporting the impeller drive shaft within the tubular member.

.In the selected embodiment of the invention herein disclosed, there is illustrated in Figure .1, for purposes of disclosure, a conventional pump casing 2 driven into the ground in the usual manner, vuntil its lower end strikes a water vane having suiicient ypressure to cause the water to rise in the casing, asv illustrated in Figure l. The upper end of the casing preferably extends slightly above the ground level, and is normally closed by a suitable head 3, which may be detachably secured thereto by such means as set screws I 0. The depth of the casing into the ground may vary considerably, depending upon the soil formation.

'I'he novel pump forming the subject matter of the present invention is shown comprising an elongated tubular member, or pipe, generally designated by the numeral 4, which is shown cornposed of a plurality of pipe sections 5, -6 and l,

coupled together in endwise relation by suitable couplings 8, which preferably are alike in construction. Each coupling comprises a cylindrical member 9 having a bearing element II fitted thereinto which may be made of a suitable moisture resistant material, such as certain types of rubber. The cylindrical bearing members 9 are supported within their respective couplings by a plurality of radial arms I2 which may be integrally formed with the elements 9 and couplings 8, as shown in Figures l and 4, whereby the arms I2 will offer little restriction to the flow of water upwardly through the tubular member 4 when the pump is operated.

Mounted in the bearings I I, within the tubular member 5 is a drive shaft I3A having its upper end supported in a bearing le, which may be awellknown type combination radial and thrust bearing, mounted on the upper end of a bracket l5 which may be supported on a cap IS received in threaded engagement with the upper end of pipe section 5. A stumng box I1, of conventional construction, is provided in the cap I6 to prevent leakage of water around the shaft where it passes through the cap I6, as is well known. The shaft i3 may be driven from a suitable electric motor I8 by a V-belt I9, having running connections with pulleys 2l and 22 provided, respectively, on the motor I8 and upper end of the shaft I3, as best shown in Figure 1.

The motor may be supported upon a bracket 23 extending from the cap I5, or, if desired, it may be formed as an integral part thereof. A suitable brace 24 may be interposed between the lower end of the bracket 23 and the pipe section 5 to reinforce the bracket and minimize vibration, when the pump is in operation. The pipe section 5 is shown having 'a water discharge spout 25.

Another important feature of the present invention resides in the unique construction of the means provided in the lower end of the tubular member 4 for pumping water from the casing and forcing it upwardly through the tubular member 4, to be discharged from the spout 25 of the pump, as will be understood by the arrows in Figure l.

The water pumping means is shown comprising a bell-like housing, generally designated by the numeral 26, which is enlarged at its lower and has a suitable closure cap 21 received in threaded engagement therewith. The upper end of the housing is reduced in diameter and is threaded to receive the lower end of the pipe section 1, as shown at 28, whereby the housing 26 may be screwed onto the lower end of pipe section 1, thereby to become in effect an integral part thereof.

A flanged bearing element 2Q is shown having a depending threaded extension 3i received in threaded engagement with a central bore 3E provided in the cap 21, and has its enlarged flanged head engaged with a concave seat 32 provided in the upper face of the cap 2?. The bearing element 29 has a central bore 33 adapted to rotatably receive the lower cylindrical end portion 34 of a dish-like member 35 which constitutes a portion of the impeller, generally designated by the numeral 3.

The impeller 36 comprises the lower dish-like member 35, and an upper cone-shaped member 31 having a threaded socket 38 at its upper end for receiving the threaded terminal 39 of the drive shaft i3. In Figure 2 it will be noted that the outer marginal edge of the upper member 31 of the impeller is disposed in fixed spaced relation to* the upper annular edge of the lower member 35,

thereby to provide an annular water discharge opening or gap 4I. A plurality of spiral vanes 42 are provided within the impeller 36, and have their lower and upper edges secured respectively to the lower and upper members 35 and 31 of the impeller, whereby the impeller constitutes, in effect, an integral unit.

To facilitate manufacture, the lower and upper parts 35 and 31, respectively, of the impeller and the vanes 42 thereof, may be die cast in a single unit, thereby to minimize machine work and to expedite the construction thereof. If desired, the upper and lower parts of the impeller may be formed independently of one another and secured together by suitable means, not shown.

A pipe section 44 is shown received in threaded engagement with the cap 21 of the impeller housing 26, and extends downwardly into the well casing thereby to lower the elevation of the intake to the housing 26.

The novel pump herein disclosed has been found very practical and efficient for pumping water from a conventional well casing. The unique construction of the impeller constitutes an important feature of the invention in that the spiral configuration of the impeller vanes 42 and their confinement within the lower dish-like member 35 of the impeller, effects a positive upward circulation or lifting of the water from the lower pipe section it into the impeller, from whence the water is discharged outwardly through the annular gap 5I of the impeller into the housing 25, when the impeller is rotated in the direc tion indicated by the arrows 45 in Figures l, 2 and 3. The water thus drawn into the housing 26 by the centrifugal action of the impeller vanes 42, develops a pressure within the housing which causes thewater to quickly rise within the tubular member l until it reaches the upper end thereof and discharges therefrom through the spout 25.

To insure maximum and positive circulation of water upwardly through the tubular member 4 of the pump, when the impeller is operated, the impeller housing is submerged in the water in the lower end of the well casing 2. When the housing 2 is provided with a depending pipe section 44, as shown in Figure 1, water may be pumped from the casing so long as the intake end of the pipe 44 is disposed beneath the surface of the water therein.

' The pump in'its entirety, as illustrated in Figure l, may readily be removed as a unit from the casing 2 by simply releasing the cap 3 from the upper end of the well casing. In Figure l, the

pump shaft vI3 is shown driven by an electric motor I3. It is to be understood, however, that it may be driven from other sources of power as, for example, an internal combustion engine, without departing from the scope of the invention. The novel pump herein disclosed has been found extremely efcient and practical in actual use. The unique construction of the impeller results in a positive pumping action at substantially all impeller speeds, whereby the volume of water pumped from the well casing may readily be controlled by varying the speed of the impeller.

The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claim should be construed as broadly as permissible in view of the prior art.

We claim as our invention:

In a centrifugal pump, an enlarged housing Valfurva 5 having its upper wall portion curving inwardly and upwardly and terminating in a discharge opening at its upper end, an upright tubular member having its lower end in communication with said discharge opening and provided at its upper end with a discharge spout, said housing having a removable bottom wall provided with a central replaceable wear insert forming an upper surface of said removable bottom wall, said replaceable insert having an unobstructed central intake bore, an impeller in said housing comprising a lower bowl-like hollow member having a central hollow unobstructed depending tubular bearing portion having its outer surface in rotary engagement with the inner surface of the bore in said replaceable insert, the upper surface of said insert and the inner surface of said bore providing a supporting bearing for said lower bowl-like hollow member, said tubular bearing portion being in communication with a source of iiuid supply, the wall of said bowl-like impeller member curving outwardly and upwardly and having its upper marginal edge terminating in close proximity to the enlarged wall portion of said housing, said impeller also comprising an upper inverted conical member having a fiat bottom surface whose maximum diameter is substantially equal to the maximum diameter of said bowl-like member, a plurality of spiral vanes secured to said lower and upper l impeller members within the impeller and vertically spacing apart the outer marginal edge portions of said impeller members, thereby to provide an annular restricted horizontally disposed fluid passage in said impeller disposed adjacent to the enlarged wall portion of the housing, and a power-driven shaft disposed within said tubular member and having its lower end extending into the housing and connected to the impeller for driving said impeller whereby when said shaft is rotated, iiuid is drawn into the impeller from the uid supply therebeneath, by the action of said spiral vanes and is outwardly circulated therefrom through said annular restricted uid passage against the enlarged wall portion of the housing, and thence upwardly through the upper portion of the housing and through said tubular member to the discharge spout at the upper end thereof.

THEODORE F. WASKOSKY. HENRY B. DILLY.

References cited in theme of this patent UNITED STATES PATENTS Number Name Date 1,386,304 Barnickol Aug. 2, 1921 1,570,285 Schleyer Jan. 19, 1926 1,650,522 Johnston Nov. 22, 1927 1,844,831 Wintroath Feb. 9, 1932 1,974,107 Hait Sept. 18, 1934 2,037,607 Wade Apr. 14, 1936 2,166,404 Hait July 18, 1939 2,465,425 Bower Mar. 29, 1949 FOREIGN PATENTS Number Country f Date 2,603 Great Britain of 1864 

